Timer



Jan. 18, 1927, ,614,419.

- 1.. A. ALEXANDER TIMER Filed August 13 1924 Patented Jan. 18, 1927.

UNITED STATES LOUIS A. ALEXANDER, OF TOLEDO, OHIO.

TIMER.

Application filed August 13, 1924. Serial No. 731,817.

This invention relates to features of insulation, more particularly as a mounting for a plurality oi? terminals.

This invention has utility when incorporated as insulation mountings for the terminals of timers as in ignition systems, especially such as are used for multiple cylinder internal combustion motors.

deterring to the drawings:

Fig. l is a view looking into a terminalv carrying housing, the terminals of which are mounted by insulation in accordance with the invention herein;

Fig. 2 is a section on the line IIII, Fig. 1;

Fig. 3 is a perspective view 01 one of the laminations of insulation ready for assem- Fig. 1 a view, with parts broken away, ot an a embled laminated insulation ready for insertion into timer housing; and

Fig. is a view of a disk assembly de vice.

The instance of this disclosure is such a timer, as to number of: terminals, as is adapted to tour cylinder type of motors for automobiles, as ot the manufacture by Ford Mott n Company. Such timer, in current practice provided with a housing 1 having a circular seat 2, with which communicate a series of openings 3 through this housing 1.

Herein laminations 4 of ring form are provided. which have seats 5 for terminals 3. The terminals 6, accordingly, are each larger than a seat 5 of a lamination. Howover, these insulation lan'iinations 4 are as semblcd to build up to bring the seats 5 to :l]i])l'())lllillii(-. continuity with the outer dimensions oi the tcrn'iinals 6. In practice such dimension may be slightly in excess of terminals. These terminals 6 are his the assembled seats 5, have stems through openings orilled in the 1 r assembled in the seat 2 v.-;.=ng 1. These stems T trom the extend through bushings 8 at term): the opt r 3) held thereon by nuts 10. The terminals 3 with their stem 7 are accordingly completely insulated by the laminations 4, bush- 1? d washers 9 from the housing 1. o ation of the timerpcontactor ll. tiw-tels over the terminals 6 in suea and between such terminals 6 rides on the laminated edges of the insulation rings 4.

In the building of the insulation ring from laminations 4 there is considerable economy, as well as an article of superior qualities throughout. In practice this insulation is of fiber and of rigid torm, resisting wearing. The relatively thin stock, compared with the completed thickness of the laminated insulation ring, is such that these laminations 4 are approximately uniform in compactness and character of the material throughout, in this respect differing from heavier stock, or rather the stock of greater thickness. The thinner stock is of less cost per pound to manufacture, so that the cost of the material bulk in the completed ring is less. Owing to the relative thinness of this stock, the ring laminations 4-. with the seats 5 may be punched out accurately at low cost. The built up insulation from these laminations 4 homogeneous, physically better, and electrically a superior insulation.

The punched laminations 4 are assembled in number to the desired thickness, pressed into the seat 2 of the housing 1, there clamped in the position which the completed insulation ring is to have, drilled, terminals assen'ibled therein, and the insulation and terminal i'aces dressed to provide continuous endless surface or track for the contactor roller 11.

In practice the assembly in units may be had and then the units inserted into the housing 1 to position in the seat 2. Every other intermediate disk or ply may be coated with adhesive 11- and assembled on stem 12 against disk 13. As to the direction of the extent of the liber in each ply, the successive ply is angularly shifted or staggered. This staggering is herein shown as 90. This is a material factor for increased wear resistance to the roller 1.1, for the end of the fiber is more lirm and is present tor the entire course of uch roller 11. The register of the seats 5 of the lamina is maintained by keys 14 on the stem 12. As a mum ber of the sets of lamina are. thus grouped, disk 15 may be crowded on the stem 12 and held in lamina set pressing position by wedge 16 driven through way 17 in the stem 12. After a period of time has elapsed for drying, the wedge 16 may be removed from the way 17 and the sets of lamina as units now assembled in the housings 1.

[he greet manufacturing value of the invention of this disclosure is in lowering of cost in quantity production, with a superior article as the result. Over a full thickness 5 ring, Whether a unit or segi'nental, the cost;

herein is approxinmtely one thirtl less.

llhnt is clniineil and is (lZSH'Ofl to secure my Letters Patent is: 

